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NEET UG Evolution — practice questions — page 3

Explore 91 free Evolution questions in NEET UG Biology. Open each question or exercise to read its content, reference answers and available explanation.

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Evolution questions and exercises with answers

Showing questions 61–90 of 91.

A population whose allele frequencies stay constant over generations is in:Read the answer and worked solution →At one gene locus, all the allele frequencies in a population add up to:Read the answer and worked solution →The equation p^2 + 2pq + q^2 = 1 is the binomial expansion of:Read the answer and worked solution →With allele frequencies p and q, the expected frequency of heterozygotes is:Read the answer and worked solution →If allele A has frequency 0.7 in a Hardy-Weinberg population, AA frequency is:Read the answer and worked solution →A gene's two alleles occur in a 60:40 ratio. What fraction is heterozygous at equilibrium?Read the answer and worked solution →If 9 percent of a population at equilibrium shows a recessive trait, carriers make up:Read the answer and worked solution →A recessive phenotype is seen in one quarter of an equilibrium population. AA frequency is:Read the answer and worked solution →Of 1000 people at equilibrium, 40 are recessive homozygotes. How many are expected to be AA?Read the answer and worked solution →A change in allele frequency that happens purely by chance is termed:Read the answer and worked solution →A small drifted group starts a new population with very different allele frequencies. This is the:Read the answer and worked solution →Repeated migration between populations that carries alleles across is called:Read the answer and worked solution →Selection under which more individuals come to have the mean character value is:Read the answer and worked solution →Which group of organisms was the first to invade land?Read the answer and worked solution →Lobefin fishes such as the coelacanth gave rise to the first:Read the answer and worked solution →Which feature freed reptiles from water for breeding, unlike amphibians?Read the answer and worked solution →Ichthyosaurs, living about 200 mya, were:Read the answer and worked solution →About when did the dinosaurs suddenly disappear from the earth?Read the answer and worked solution →Giant pteridophytes of the reptile age fell and slowly formed:Read the answer and worked solution →South American mammals resembling horse and bear were overridden when that continent joined:Read the answer and worked solution →Of the primates living about 15 mya, which was the more man-like?Read the answer and worked solution →Which hominid used hides to protect its body and buried its dead?Read the answer and worked solution →Fossils revealing Homo erectus were discovered in Java in:Read the answer and worked solution →The prehistoric cave paintings of Bhimbetka are in which state?Read the answer and worked solution →Agriculture and settled human habitation began around:Read the answer and worked solution →Hominid fossils from Ethiopia and Tanzania suggest man-like primates walked upright about:Read the answer and worked solution →Australopithecines hunted with stone weapons but mainly ate:Read the answer and worked solution →Chemical evolution refers to the formation of:Read the answer and worked solution →Why did white-winged moths decline near factories in England?Read the answer and worked solution →Breeders making new dog breeds in centuries is used to argue that, over millions of years, nature could:Read the answer and worked solution →

Worked practice questions

A population whose allele frequencies stay constant over generations is in:

  1. Genetic equilibrium
  2. Genetic drift
  3. Founder effect
  4. Directional change
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Correct answer: A. Genetic equilibrium

A stable gene pool with unchanging allele frequencies is described as genetic equilibrium.

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At one gene locus, all the allele frequencies in a population add up to:

  1. 0.5
  2. 1
  3. 2
  4. 0.25
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Correct answer: B. 1

Allele frequencies are proportions of the whole, so together they always total 1.

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The equation p^2 + 2pq + q^2 = 1 is the binomial expansion of:

  1. (p-q)^2
  2. 2(p+q)
  3. (p+q)^2
  4. (p+q)^3
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Correct answer: C. (p+q)^2

Squaring (p+q) gives p^2 + 2pq + q^2, and since p+q = 1 the sum equals 1.

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More Biology topics

Genetics and EvolutionReproduction in Organisms & PlantsBiotechnology and ApplicationsBiodiversity and ConservationThe Living World & Biological ClassificationNeural Control and Chemical CoordinationPrinciples of Inheritance and VariationAnimal Kingdom